Pencil



H. L. BLACKMAN.

PENCIL.

APPLICATION FILED SEPT. 5, 1919.

Patented Aug. 24, 1920.

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" ATTORNEYS I WITNESSES UNITED STATES PATENT OFFICE,

HORACE LYMAN BLAGKMAN,OF J AN ESVILLE WISGONSJ IN.

PENCIL.

.To all whom it mag concern:

Be it known that I, HORACE L. BLACKMAN, a citizen of the United States, and a resident of Janesville, in the county of Rock and State of Wisconsin, have invented a new and Improved iencil, of which the following a full, clear, and exact description.

This invention relates-to new and useful improvements in pencils, and it pertains more particularly to that type of pencil in which a lead is fed longitudinally of the body of the pencil by means of a suitable lead-feeding mechanism.

It is the primary object of the invention to provide a new and novel lead-feeding mechanism adapted for use in pencils of this character.

It is a further object of the invention to provide a new and novel form of lead holder for pencils of the above mentioned type.

It is a further object of the invention to construct a pencil of this type which has the fewest number of working parts.

With the above and other objects in view,

reference is had to the accompanying drawings, in which- Figure 1 is a longitudinal sectional View of the pencil;

Fig. 2 is a sectional view on the line 22 of Fig. 1;

Fig. 3 is a detail View partly in section of the rear end of the pencil;

Fig. 4 is a detail sectional view of the internal sleeve.

Referring more particularly to the drawings, the device comprises a barrel 5, the

forward end of which is tapered as at 6,

said tapered end being provided with an opening 7, through which the lead is projected. Rigidly secured to the interior of thebarrel-5, at the base of the tapered portion 6, is a washer 8, said washer being provided with a serrated face 9.

The reference character 10 designates a lead-holder, and said lead-holder is slotted as at 11, at its forward end, to provide means for resiliently gripping the lead, which is indicated by the reference character 12. This lead-holding member 10 is secured at its rear end to the washer 8, and it also has its rear end flared as indicated by the; reference character 13.

A feed screw designated by the reference 7 character 14, is secured at its forward end Specification of Letters Patent. Patented Aug. 24, 1920. Application filed september 5, 1919. Serial No. 321,884. I

out as at 16, to provide resilient fingers 17 for gripping the lead, and these fingers engage with the inner face of the flared portion 13 of the lead-holder 10, to cause said resilient fingers to function. Surrounding the forward end of the feed screw 14, is a washer 18, and carried by said washer 18, is a sleeve 19, which extends from the washer 15 to the rear open end of the barrel 5. Secured to the-feed'screw 14 and engaging the washer 18, is a washer 18, which serves as a guide for the washer 18, the same operating between the washer 15 and the washer 18. The sleeve 19 is permanently attached to the washer l8, and mounted between said sleeve 19 and the barrel 5, is a bushing 20, which serves to fill the space between said Sleeve 19 and the barrel 5. Secured to the rear end of the sleeve 19, by means of a flange 21, is a cup member 22, and said cup member carries an erasing element 23. As designated by the reference character 24, the sleeve 19 has its rear end reduced in or der that it may be received within the flange 21. This flange 21 is provided with a continuous annular groove 25, and leading from said annular groove 25, is an angular groove 26.

The reference character 27 designates a sleeve which is adapted to be positioned interiorly of the barrel 5, and carried by the inner face of said sleeve is ,a pin or projec tion 28, which is adapted to engage in the annular groove 25 to retain the parts in their operative position, it being understood that the said projection 28 passes through the angular groove 26 to the annular groove 25 upon insertion of the sleeve 19'into the ner that the cup member 22 is free to rotate with respect to said rear end of the feed screw.

Mounted internally of the sleeve 19, is a sleeve 34, and. as shown'in Fig. 2, this sleeve lead-pushing member, and said lead-pushing feed screw 14, the member 40 will be moved member is provided on its rear end, with an angularly-disposed bar 41, which is adapted to lie within the passage 14 and engage between the convolutions of the feed screw 14. This angularly disposed bar 41 is adapted to engage the sleeve 34 at points designated by-the reference character-43, in

such a manner that when the sleeves 19 and.

34 are rotated, the lead-pushing member 40 will likewise be rotated, and owing to 1ts engagement between the convolutions of the or fed longitudinally of the barrel 5. As designated by the reference character 45, the forward end of the lead-pushing member 40 engages the lead 12.

As shown in Fig. 1, a retaining clip 47 is secured to the sleeve 30, said clip being arranged in a notch 48 in the barrel 5, which prevents a rotation of the sleeve 27.

From the foregoing, it will be seen that as thecup member 22 is rotated within the rear.

end of the barrel, the sleeves 19 and 34 will likewise be rotated. Upon rotation of the sleeves 19 and 34, due to the engagement of the angularly disposed cross bar 41 with the sleeve 34, the lead-pushing member 40 will be rotated, and upon rotation as it passes through the convolutions of the feed screw, said lead-pushing member 40 will be fed longitudinally of the feed screw 14. Inasmuch as the forward end of the lead-pushing member engages the lead, it will be seen that as said lead-pushing member moves longitudinally of the feed screw 14, the lead 12 will be projected from the forward tapered end of the pencil barrel.

When it is desired to replace the lead within the barrel, the lead-pushing element is retracted by a rotation of the sleeves 19 and 34 in the opposite direction, thus taking the lead-pushing member away from the lead 12. After this has been accomplished, the lead may be pushed into the barrel by means of the finger, or in any other desired manner.

lead, 2'. e., the, resilient fingers 17 of the feed screw 14, and the resiliency of the forward end of the lead-holder 10, it will be readily apparent that sufficient grip on the lead is obtained to prevent it from becoming displaced in the pencil barrel, thus insuring its proper position in the barrel at all times.

By forming the sleeve 34 as shown, it will be seen that a space 50 is provided on opposite sides thereof, which space is used for the storage of leads when not in use.

When it is desired to remove one of the leads from the magazine 50 for the purpose of renewing the lead in the pencil, the eraser 23 is removed by turning the same in such a manner that the projection 28 travels through the grooves 25 and 26, which permits of this action. This leaves-the rear end of the tubular member 19 open in order that the leads may be removed.

Inremoving the eraser 23, the cap 23 which incloses said eraser is slipped off the cup member 22. This cup member 22 is then rotated in such a manner that the pin 28 moves through the annular groove 25 to a point where it may be received within the angular groove 26. By pulling upon the cup member 22, the pin 28 will pass through the angular slot 26 and permit of the eraser and cup member 22, together with the flange 21, being removed from the open end of the sleeve 19.

Having thus described my invention, what I claim is:

1. A pencil comprising a barrel having a tapered end, a lead-holder rigidly secured to said tapered end, a sleeve rotatably mounted in said barrel, and a second sleeve carried by the first-mentioned sleeve, said second-mentioned sleeve having an elon-' gated cross sectional form to provide a leadretaining space between itself and the firstmentioned sleeve.

2. A pencil, comprising a barrel having one end tapered and the other end open; a lead holder within the tapered end of the barrel, a sleeve rotatably mounted in the barrel and extending to and terminating at the open end of said barrel, means at the open end of the barrel for rotating the sleeve, a second sleeve in the first sleeve and rotatable therewith, a tubular screw fixedly mounted within the second sleeve, and a lead pusher mounted in the screw and having an angularly disposed T-shaped head having its members extending through the convolutions of the screw and engaging the second sleeve so as to rotate therewith.

3. A pencil comprising a barrel having one end tapered and the other end open, a lead holder in the tapered end of the barrel, a sleeve rotatably mounted in the barrel and extending to the open end of the barrel,

' a member on the open end of the barrel and Owing to the double frictional grip on the having interlocking engagement with the sleeve so as tov rotate the sleeve, a second sleeve in the first sleeve and rotatable therein the second sleeve, mounted in the screw and having a head extending through the convolution of the screw and engaging the second sleeve so as to rotate therewith.

4. A pencil, comprising a barrel having one end tapered and the other end open, a lead holder in the tapered end of the barrel, a sleeve rotatably mounted in the barrel and extending to the open end thereof, a second sleeve within the first sleeve and rotatable therewith, a tubular screw within the second sleeve and having its lower end fixedly secured, a member mounted to turn on the open end of the barrel and the upper end of the screw, said member engaging the first named sleeve so as to rotate said sleeves, and a lead pusher mounted in the screw and having a head extending through the convolutions of the screw and engaging the second sleeve so as to rotate therewith.

5. A pencil comprising a barrel having a tapered end, a leadholder carried by said tapered end and fixed therein, a feed screw mounted interiorly of said barrel, a washer rigidly carried by the barrel, a washer fixedly carried by said feed screw and engaging the washer rigidly carried by the barrel to prevent rotary movement of said feed screw, a sleeve rotatably mounted in said barrel, means projecting from one end of said barrel for rotating said sleeve, a second sleeve carried interiorly of thefirstmentioned sleeve and rotatable therewith, and means carried by said feed screw and movable between the convolutions thereof, said secondmentioned sleeve being provided with means for causing the last mentioned means to turn therewith, to project and a lead pusher the writing lead from one end of the barrel upon rotary movement of the sleeves within the barrel.

6. A pencil comprising a barrel, a lead holder carried by the barrel, a sleeve mounted interiorly of said barrel and rotatable thereon, a second sleeve substantially oval in cross section mounted within the firstmentioned sleeve and adapted to be rotated with, a tubular screw fixedly mounted with- I thereby, means for rotating said sleeves, a feed screw centrally disposed and extending longitudinally of the said second-mentioned sleeve, said feed screw having a continuous passage between its convolutions, a lead pushing element movable longitudinally of the feed screw, and an angularly disposed T-head carried by the lead-pushing element and projecting through the convolutions of the feed screw, said T-head engaging the innermost sleeve whereby the lead-pushing element will be rotated upon rotation of said sleeve.

7. A pencil, comprising, a barrel having a tapered end, a fixed washer in the barrel at the base of the tapered end, a lead holder in the tapered end of the barrel and having a flared end secured to said washer, a sleeve rotatably mounted in the barrel, a second sleeve mounted in the first sleeve and rotatable therewith, a tubular screw fixedly mounted within the second sleeve and having its lower end extending through the said washer into the lead holder and provided with fingers for engaging the lead, a lead pusher mounted in the screw and having a head extending through the convolutions of the screw and engaging the second sleeve so as to turn therewith, and means for rotating the said sleeves.

8. A pencil comprising a barrel, a lead holder carried by the barrel, a sleeve rotatably mounted internally of said barrel, means for rotating said sleeve, a second sleeve oval in cross sectional form disposed internally of the first mentioned sleeve and fixed thereto to rotate therewith, a stationary feed screw concentrically disposed within said sleeves and comprising a continuous spiral member, a lead-advancing member movable longitudinally of said feed screw, and an angularly disposed T-head carried by the lead-advancing member and project ing through the convolutions of the feed screw into engagement with the inner face .of said oval sleeve whereby the lead-advanclng'member is rotated through the stationary feed screw upon rotation of the rotating sleeves.

HORACE LYMAN BLAOKMAN. 

